Feed mechanism for machine tools



Apr. 10, 1923. 1,451,061

. TROSCH FEED MECHANISM FOR MACHINE TOOLS Filed Oct. 15, 1919 fnvenzi ir aifrec'i 'r afiC Patented Apr. 10, 1923.

UNITED STATES PATENTOFFICE.-

VALFRED 'rnoson, or ROCHESTER, NEW YOBK,,ASSIG1\IOR To ARTHUR H. 1NGLE, or

- ,nocEEs'rER, NEW ORK FEED MECHANISM FOR MACHII NE TOOLS.

Application filed Octob r 15, 1919." mar No. 330,816.

To aZ'Z-whomz't may concern." v 1 I Be it'known that I, ALFRED TRosoH, a citizen of the United States, and resident of Rochester, county of Monroe, State of New 5 York, have invented an Improvement in Feed Mechanisms for-Machine Tools, of which the'following description, in connec.- tion withthe accompanying drawings, is a specification, like characters on the drawings rep-resenting like parts in each of the several views. I J This'invention relates to mechanism for imparting "intermittent automatic feed movement to machine tools, and. more particularly to means for feeding the tool holder in the saddle or the saddle on the cross rail'of a'plan'er In machines of this type it has been customary to derive the step-by-step movement of the tool holder or the tool saddle from a vertically extended shaft at one side of the machine, which is oscillated intermittently by suitable mechanical connections from the operating mechanism of the planer table. To impart this intermittent oscillating movement to the vertical shaft has required a mechanism of a more or less elaborate character and the object of the present invention is to eliminate this mechanism for obtaining the intermittent oscillating feed movement, by providing a magnetically operated device, operative directly on the vertical shaft to oscillate the same, this device being energized by electric current connections controlled preferably by the movement of the planer table or platen' The foregoing and other objects and advantages of the invention will be better understood from the following detailed description, taken in connec- 49 tion with the accompanying drawings and the distinctive features of novelty will then be ointed out in the appended claims.

l eferring to the drawings: Fig. 1 is a side elevation showing the principal portion of a planer structure with my invention embodied therein; and

Fig. 2 is a horizontal sectional detail on line 22 of Fig. 1.

10 indicates aplaner bed, having a table 11 mounted for movement on the ways thereof. 12 indicates the vertical columns at the sides of the planer bed, on which the cross rail 14 is mounted for vertical adjustment. 17 indicates a shaft vertically mounted and journaled to extend upward alongside the column 12, this shaft, through beveled gear- [I ing 18 and an adjustable crank connection 19, transmitting power to operate selectively the horizontal feed "screw 20 andthe feed shaft 21 for the vertical feed, both of which are as usual journaled in v the crossrail. .14. In accordance-with usual practice the shaft 17- 'is oscillated intermittently in the opera tion of the machine, but only transmits a one-way movement in either direction asrequired, to the feed screw or feed shaft for the step-by-step feed, this one way feed movement being effected by a pawl and ratchet device or other like expedient not shown) in the connection from the. crank -19: tothe-feed screw and feed rod.

All the parts and connections thusifar described are of ordinary and well known type and need not be further detailed herein. In accordance with myinvention, the shaft 17 is equipped for magnetic actuation to oscillapoe1 the same at each movement of the planer ta 1 e. the lower end of the shaft 17 a spur gear 22 which is engaged by a rack 23 suitably guided in a bracket 24 fixed at the side of the upright. This rack is connected with the core of a solenoid 25 which is preferably, and as shown, of a double actingtype adapted to draw the core and with it the rack 23 in both directions. This double solenoid is equipped with connections to a source of electric energy 26 and with controlling means whereby it is energized to move the core alternately in opposite directions at each reciprocatory movement of the planer table. For this purpose one end of the solenoid has circuit connections 27 leading to spaced apart contacts 28 adapted tobe connected by a bridging contact 29 carried at the lower end of a swinging arm 30, in one position of said arm The other end .of the solenoid has similar connections 31 with a pair of spaced contacts 32 which are bridged by the contact 29 in the other shifted position of the arm 30. The arm 30 is pivoted to the machine bed at 33 and its upper end is engaged by dogs 34 a-djustably fixed-to the side of the planer table 11, this rocker arm 30 and the dogs 34 being a feature of the usual equipement which has as its prime function to operate a master switch 35 which controls the driving motor of the planer,

For this purpose, as shown, I fix at table. Thus at the completion of each opend of "the double*solenoid 25" will he energized and the reick 2 thus vvillmeeeive a'ireciprocatory movement in timed relation with :theimovements of the planer table as the contaots 28,32 are successively bridged to deliver the current from the source of energy 26 alternately to the-respeetive- -ends of the solenoid. Thus the shaft 17 is oscillated for a movement suflicien'tito ieed the tool1head l or the tool saddle as required, the amount of this feed moveme'iit beiing =-'determined by s the adjustment-of "the =tr ansmitting :crank 19. I I am aware that the invention a may be embodied in other'="s'pecific"forms' without departing from the ispirit or :essentia'l attributes thereof, and I therefore' desire' the present embodim'ent to be considered :inall resp'eets as "zillustrative and not. restrictive,

' reference heing hatl to the iappendedfclaims rather "than to the foregoiing description to 7 indicate the scope of the invention.

Havi'ng described my inventionfwhat 1 claim as new and desire to secure 'by-lietters T 'A "planer, comprising a fwork table, 2a tool holder 'mou'nted vfor movement with respect :ztherto, a solenoid connected for eontrol by the Pamovement ofwsaidewonk table, and :having "a movableioorie, meansfl'for imparting ifeed movement to the tool holder, and a connection from said core to said means" to actuate "thesa-me.

"2. A filaner, comprising a Work table, a

-tool holder mounted for movement with respect thereto, a vertical shaft mounted at one+side-of ---said table, and connected to connections to :have wthe' two K ends! thereofeenengized alternately ab y -the atable movement. rIIn testimony whereof, I have signedgnpy name to this i specification.

ALFRED TROSCH. 

